A dog judge must have a license issued by the Kennel Club in their country of residence. These licenses are issued to those who have undergone training and/or examinations to ensure they have knowledge of all the individual breeds' unique characteristics. Each Kennel Club has its own system of granting licenses to dog judges. Often this consists of a training scheme and/or a series of lectures or seminars plus an examination scheme which may be theoretical, practical or a combination of both.
This is a judge who obtains a judging license for all breeds recognised in their country of residence. In some countries a license to judge every group is required to also judge Best in Show. In other countries, a license to judge only a majority of breeds or groups is required in order to be able to judge Best in Show.
This is a judge who obtains a license for breeds contained within an entire Group. These may be obtained breed by breed, or for the entire Group all at once. Some countries issue a separate license to judge Best in each of the Groups. In other countries it is sufficient to be licensed to judge all or most of the breeds contained within that Group in order to judge Best in Group.
This is a judge who has an intimate knowledge of one particular breed or sub-group of breeds, and has also been granted a judging license for that breed by the Kennel Club in his or her country of residence. To qualify as having an intimate knowledge of a breed, that person has usually bred or owned a number of Champions in that breed. However, any person who has made a significant contribution to a particular breed could also be considered to be a specialist in that breed.